limwire has a reputation for being a hotbed of infection. For the purpose of this Forum, we will assume that anything that you download is free of Copyright.

Any files you download "Must" be checked by McAfee before they are opened. you should be updating and running McAfee, at the very least, once a week. I update & run AVG every day.

You should consider running some anti Malware software. I run Spybot S&D, Adaware and SuperantiSpyware, all free.

If you use the search bar in this Forum you will find an number of other free programs. Top of that list is a Firewall, which may be included in McAfee, I use Zone Alarm but Comodo is very highly spoken of.